::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact

Water Usage and Washing Machines

September 16th, 2018
house, water, efficiency  [html]

Earlier this month (9/4) our dishwasher started leaking, and I disconnected it. The new dishwasher comes in about a week, but I was curious whether I would see an increase in our water usage from handwashing the dishes. After downloading the data, though, there were more interesting slope changes:

I think most of these make sense:

Here's how I see water usage changing:

  • Decrease when we bought the house, because unit two was vacant until we were ready to move in, then an increase when we moved in.

  • Temporary decrease when we moved out because of a mercury spill, but not all the way to zero because the first floor was still occupied (two people).

  • Temporary decrease when we moved out to have dormers installed, but a smaller one than before because both the first and second floors were still occupied (four people).

  • Sharp decrease at the end of March 2018, when we replaced the very old top loading washing machine broke and we replaced it with a new high-efficiency front-loader.

Here's a similar chart, with years stacked:

Comparing just 2017 and 2018 the change from the washing machine is pretty dramatic:

How much water did that save us? We've had the new washer for 171 days and used 30k gal, while during the corresponding 171 days last year we used 46k gal, so 16k gal more. Our cost per gallon (water and sewer) is 1.65¢, so simple extrapolation says we're saving $584/y on water with the new machine. Plus a substantial fraction of those saved gallons were heated, so we're saving fuel too.

This is a washer that gets a lot of use (average of seven adults and two kids) but with these sorts of savings we should have done it sooner!

Comment via: google plus, facebook

Recent posts on blogs I like:

How Fast New York Regional Rail Could Be Part 2

In my last post about New York regional rail schedules, I covered the New Haven and Harlem Lines of Metro-North and the Main Line and Hempstead Branch of the LIRR. I was hoping to cover more lines tonight, but due to time constraints only the Hudson Line …

via Pedestrian Observations October 17, 2019

Strong stances

I. The question of confidence Should one hold strong opinions? Some say yes. Some say that while it’s hard to tell, it tentatively seems pretty bad (probably). There are many pragmatically great upsides, and a couple of arguably unconscionable downsides. …

via Meteuphoric October 15, 2019

What do executives do, anyway?

An executive with 8,000 indirect reports and 2000 hours of work in a year can afford to spend, at most, 15 minutes per year per person in their reporting hierarchy... even if they work on nothing else. That job seems impossible. How can anyone make any im…

via apenwarr September 29, 2019

more     (via openring)

More Posts:


  ::  Posts  ::  RSS  ::  ◂◂RSS  ::  Contact